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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        var nmn = 100
        var nmn1 = 10
        // 加减乘除
        console.log(nmn + nmn1);
        console.log(nmn - nmn1);
        console.log(nmn * nmn1);
        console.log(nmn / nmn1);
        // 取余(%)
        console.log(nmn % nmn1);
        // 自增自减运算符相当于 当前值+1或-1
        var age = 20
        console.log(++age);
        console.log(--age);
    </script>
</body>

</html>